Firefighters from Station 33 in Sherwood were the first to arrive and found the blaze fully consuming the barn.

No one was inside the structure at the time of the fire, but investigators said that a cat was possibly in the barn at the time of the fire.

More than 40 firefighters responded to the fire from TV&R, as well as Newberg Fire and Washington County Fire District No. 2.

Crews used nearby hydrants and water tankers to battle the blaze.

According to TVF&R, firefighters heard several small popping sounds coming from inside the structure as it burned. Those sounds likely came from small standard-sized propane tanks stored inside the barn, TVF&R said.

At least one vehicle and farm equipment were stored in the barn as well, TVF&R said.

Firefighters were eventually able to knock down the fire and minimize exposure to nearby trees. In a brief statement on Friday, the agency said that investigators had not found a clear cause for the fire and it was listed as "undetermined."

No one was injured, and no other structures were immediately threatened by the fire, TVF&R said.

The fire is estimated to have caused about $40,000 worth of damage to the barn and surrounding property.